Class 12 Chemistry simulations · Coordination Compounds

Crystal field splitting in octahedral complexes

Set the d-electron count and the splitting Δₒ compared with the pairing energy P to get high- or low-spin complexes.

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What to notice

Strong-field ligands (Δₒ > P) give low-spin complexes; weak-field ligands (Δₒ < P) give high-spin complexes.

Key relation

CFSE = (−0.4 n(t₂g) + 0.6 n(e_g)) Δₒ ; absorbed λ (nm) ≈ 10⁷ / Δₒ (cm⁻¹)

Try this

For d⁶, compare Δₒ < P with Δₒ > P. How many unpaired electrons in each?

What you can change

• d electrons: 1 to 10
• Δₒ: 10000 to 35000 cm⁻¹
• Pairing energy P: 10000 to 30000 cm⁻¹

More in Coordination Compounds

• Geometrical isomers of complexes

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